Ted and others have mentioned more than once that stock rocker ratios can vary quite a bit. So I thought I should check my set of 1.43s. They are new, being cobbled together from 3 ebay auctions. Starting with a dirty bare block, one lifter installed for #2 intake, used .360 lift truck cam inserted, cam gear installed, intake valve and spring installed, head attached, push rod inserted. Then a shaft was cut down for two rocker stands. One of the stand's bore was sanded with 220 so it would require minimal effort to put on and take off. A dial gauge was mounted so it contacted the spring retainer, and would not have to be disturbed. The piece of shaft, two stands, a dummy rocker serving as spacer, shaft spring, and the rocker to be tested were bolted in place, lash adjusted to zero. While turning the cam gear by hand it was easy to see the travel.
The set of rockers measured between .362 and .355 lift, except two. One was .340, the other .348 inch. Both were replaced with a couple of excellent used rockers which luckily were on hand, and which were .356 and .358. Unfortunately the two used units are the old heavier style with two piece adjusters, so they will go on #1 and #5 exhausts.
If you go through the same process, but have the adjuster nut set so it compressing the spring like say .015, and start from there as zero on the dial gauge, it is immediately clear what the smart guys have been saying about how the length of the adjuster affects rocker ratio. The first set of numbers were coming out high, like .370 plus. I figured the lash wouldnt have to be set to zero on each rocker, because the cam was still going to be lifting the same amount irregardless. All the rockers were tight against the valve, actually compressing the spring some. Found out yes the cam was lifting the same amount but the ratios were artificially increased due to the extension of the adjusters. So went through the process again for the first 6 or 7 rockers, using zero lash and assuring no spring compression when closed.